catalyst is measured by readings from both primary and secondary oxygen sensors. On V8 engines you may have bank 1 and bank 2 depending on year of vehicle
if you have a cat efficiency low code most likely it is the converter itself I have had to replace a lot of them but it is best to verify with a scan tool
ASE certified master tech / L1
above the filter
It's located on the intake manifold itself.
Screwed into the engine block very near the oil filter.
It is also known as a Pickup Coil that is located under the rotor inside the Distributor cap.
Under hood, center, upper engine area, mounted in driver side of water outlet
I cannot say for sure about jeeps after 2001 because I dont have much experience with these vehicles but pre 2001 all jeep crank sensors are located on the top of the transmission bell housing you can access the sensor from underneath the vehicle
The crankshaft sensor on a 4.0L Jeep Grand Cherokee is mounted on the top driver side of the transmission bell housing.
The fuel gauge in a 2001 Cherokee could be having different readings due to a bad fuel sensor. The sensor is mounted inside of the fuel tank.
What type of coolant sensor? The below answer is for the coolant LEVEL sensor. The coolant TEMPERATURE sensor on my vehicle is located just next to the thermostat housing. On the front top center area of the engine just behind the radiator. Follow the coolant hoses if you have trouble. On my 1995 Jeep Grand Cherokee the sensor is located on the top of the plastic coolant reservoir tank. Look for a small (2-wire?) electrical connector.
where is the speed sensor for the transmission located in 2001 chevy venture
The engine computer uses the engine coolant temperature sensor to decide when to run the electric radiator fan. It is located very near where the upper radiator hose attaches to the engine.
Where is a crankshaft sensor located on a nissan almera 2001